Influence of surface roughness from additive manufacturing on laser ultrasonics measurements

Chaitanya Bakre, Mostafa Hassanian, Cliff Lissenden

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Additive manufacturing (AM) is viewed as a revolutionary technique as it offers numerous appealing capabilities such as complex geometries, functionally graded properties, build-upon-demand, repairs, etc. However, in order to attain the full potential of AM, nondestructive testing for quality assurance of AM parts is essential. Laser ultrasound is of particular interest as a nondestructive technique for AM as it provides a viable means of in-situ process monitoring that could ultimately provide feedback for process control. Rayleigh waves generated by a pulsed laser could interrogate the current layer in the AM build and be received by a laser interferometer. The surface roughness is one challenge that must be overcome if Rayleigh waves are to be used for in-situ monitoring. Surface roughness has detrimental effects on the quality of measurements of laser ultrasonics due to factors such as speckle noise, non-uniform reflectivity of the surface, and wave scattering. In this research, we have studied the effects of surface roughness on generation, ultrasonic wave propagation and reception of laser-generated Rayleigh waves. Further investigations on the effects of surface roughness on nonlinear ultrasonic waves are also being carried out.

Original languageEnglish (US)
Title of host publication45th Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 38
EditorsSimon Laflamme, Stephen Holland, Leonard J. Bond
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418325
DOIs
StatePublished - May 8 2019
Event45th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2018 - Burlington, United States
Duration: Jul 15 2018Jul 19 2018

Publication series

NameAIP Conference Proceedings
Volume2102
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference45th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2018
CountryUnited States
CityBurlington
Period7/15/187/19/18

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Bakre, C., Hassanian, M., & Lissenden, C. (2019). Influence of surface roughness from additive manufacturing on laser ultrasonics measurements. In S. Laflamme, S. Holland, & L. J. Bond (Eds.), 45th Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 38 [020009] (AIP Conference Proceedings; Vol. 2102). American Institute of Physics Inc.. https://doi.org/10.1063/1.5099713